Apparatus and method for performing multi-tasking in portable terminal

ABSTRACT

A multi-tasking execution apparatus and a method for easily controlling applications running in a portable terminal are provided. The apparatus includes a display and a controller. The display displays an application-containing image in which at least one specific image representing at least one application running in a background is contained and arranged. The controller operatively displays at least one specific image representing at least one application running in the background, so as to be contained in the application-containing image, and controls the at least one application running in the background by controlling the specific image based on a specific gesture.

PRIORITY

This application is a continuation application of prior application Ser.No. 13/755,341, filed on Jan. 31, 2013, which claimed the benefit under35 U.S.0 §119(a) of a Korean patent application filed on Feb. 3, 2012 inthe Korean Intellectual Property Office and assigned Serial number10-2012-0011107, the entire disclosure of which is hereby incorporatedby reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to an apparatus and method for performingmulti-tasking in a portable terminal More particularly, the presentinvention relates to a multi-tasking execution apparatus and methodcapable of easily controlling applications that are running in aportable terminal.

2. Description of the Related Art

Many portable terminals still have a software platform supporting thesingle-tasking environment. However, these portable terminals supportingthe single-tasking environment may lose competitiveness in the cominghigh-end smartphone market.

Recently, portable terminals capable of multi-tasking have led the newtrend of the smartphone market. Such advanced portable terminals with amulti-tasking platform are expected to replace the existing portableterminals with a single-tasking platform, thereby making it possible formany users to perform multi-tasking on their own portable terminal

To maximize the user convenience in the multi-tasking environment, thereis a need for an appropriate interface that can inform users of themulti-tasking and facilitate switching between running applications.

When an application presently running on a screen is paused, theapplication simply disappears from the screen, so it is difficult forthe user to determine whether the application has entered a backgroundstate or whether the application has been terminated.

To check a list of applications running in the background, a user mustgo through an annoying key input and its associated operation, thoughsuch a process for determining what applications are running in thebackground may be different depending on an Operating System (OS) or aplatform on which a specific portable terminal operates. Further,inconveniently, the user may find it difficult to identify theapplications presently running in the background, as the recently usedprograms (or applications) will be displayed together in the list ofapplications running in the background.

Therefore, a need exists for an apparatus and method for providingmulti-tasking execution and for easily and intuitively controllingapplications that are running in a portable terminal.

The above is presented as background information only to assist with anunderstanding of the present disclosure. No determination has been made,and no assertion is made, as to whether any of the above might beapplicable as prior art with regard to the present invention.

SUMMARY OF THE INVENTION

Aspects of the present invention are to address at least theabove-mentioned problems and/or disadvantages and to provide at leastthe advantages described below. Accordingly, an aspect of the presentinvention is to provide a multi-tasking execution apparatus and methodcapable of easily and intuitively controlling applications that arerunning in a portable terminal.

In accordance with one aspect of the present invention, an apparatus forperforming multi-tasking in a portable terminal is provided. Theapparatus includes a display for displaying an application-containingimage in which at least one specific image representing at least oneapplication running in a background is contained and arranged, and acontroller for operatively displaying at least one specific imagerepresenting at least one application running in the background, so asto be contained in the application-containing image, and for controllingthe at least one application running in the background by controllingthe specific image based on a specific gesture.

In accordance with another aspect of the present invention, a method forperforming multi-tasking in a portable terminal is provided. The methodincludes, if there is at least one application running in a background,displaying an application-containing image in which at least onespecific image representing at least one application running in thebackground is contained and arranged, and if a specific gesture occurs,controlling the at least one application running in the background bycontrolling the specific image.

Other aspects, advantages, and salient features of the invention willbecome apparent to those skilled in the art from the following detaileddescription, which, taken in conjunction with the annexed drawings,discloses exemplary embodiments of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features, and advantages of certainexemplary embodiments of the present invention will be more apparentfrom the following description taken in conjunction with theaccompanying drawings, in which:

FIG. 1 shows a structure of a portable terminal according to anexemplary embodiment of the present invention;

FIGS. 2A and 2B show a process of controlling applications that arerunning in a portable terminal according to an exemplary embodiment ofthe present invention; and

FIGS. 3A to 3F show operations in the process of FIG. 2 according to anexemplary embodiment of the present invention.

Throughout the drawings, it should be noted that like reference numbersare used to depict the same or similar elements, features, andstructures.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

The following description with reference to the accompanying drawings isprovided to assist in a comprehensive understanding of exemplaryembodiments of the invention as defined by the claims and theirequivalents. It includes various specific details to assist in thatunderstanding but these are to be regarded as merely exemplary.Accordingly, those of ordinary skill in the art will recognize thatvarious changes and modifications of the embodiments described hereincan be made without departing from the scope and sprit of the invention.In addition, descriptions of well-known functions and constructions maybe omitted for clarity and conciseness.

The terms and words used in the following description and claims are notlimited to the bibliographical meanings, but, are merely used by theinventor to enable a clear and consistent understanding of theinvention. Accordingly, it should be apparent to those skilled in theart that the following description of exemplary embodiments of thepresent invention is provided for illustration purpose only and not forthe purpose of limiting the invention as defined by the appended claimsand their equivalents.

It is to be understood that the singular forms “a,” “an,” and “the”include plural referents unless the context clearly dictates otherwise.Thus, for example, reference to “a component surface” includes referenceto one or more of such surfaces.

FIG. 1 shows a structure of a portable terminal according to anexemplary embodiment of the present invention.

Referring to FIG. 1, a Radio Frequency (RF) unit 123 is responsible forwireless communication of the portable terminal The RF unit 123 includesan RF transmitter for up-converting a frequency of transmission signalsand for amplifying the up-converted transmission signals, and an RFreceiver for low-noise-amplifying received signals and fordown-converting a frequency of the amplified received signals. A dataprocessor 120 has a transmitter for coding and modulating thetransmission signals, and a receiver for demodulating and decoding thereceived signals. In other words, the data processor 120 may include aMOdulator/DEModulator (MODEM) and a COder/DECoder (CODEC). As anexample, the CODEC may include a data CODEC for processing data signalssuch as packet data and an audio CODEC for processing audio signals suchas voice. An audio processor 125 plays received audio signals outputfrom the audio CODEC in the data processor 120 using a speaker SPK, andtransfers transmission audio signals picked up by a microphone MIC tothe audio CODEC in the data processor 120.

A key input unit 127 has alphanumeric keys for inputting alphanumericinformation and function keys for setting a variety of functions.

A memory 130 may include a program memory and a data memory. The programmemory may store programs for controlling the overall operation of theportable terminal and programs for controlling applications that arerunning in the portable terminal according to an exemplary embodiment ofthe present invention. The data memory may temporarily store the datagenerated during execution of the programs.

A controller 110 controls the overall operation of the portable terminal

In accordance with an exemplary embodiment of the present invention, thecontroller 110 operatively displays at least one specific imagerepresenting at least one application running in the background, so asto be contained and arranged in an application-containing image, andcontrols the at least one application running in the background bycontrolling the specific image based on a specific gesture (e.g., aspecific user gesture).

When there is at least one application running in the background, orwhen a specific gesture occurs or a specific key is input, thecontroller 110 of the portable terminal may operatively display theapplication-containing image in which at least one specific imagerepresenting at least one application running in the background iscontained, in a specific region of a display 160. In an exemplaryembodiment of the present invention, the specific region may be thebottom of a screen of the display 160. For example, theapplication-containing image is displayed as a file folder image and atleast one specific image representing at least one application runningin the background is displayed as a file image, providing an image thatfiles are arranged in a file folder.

According to an exemplary embodiment of the present invention, when atouch-and-drag-down in a down direction where the application-containingimage is displayed occurs on the screen of the display 160 on which aspecific application is running presently, the controller 110 pauses thespecific application while operatively displaying an effect that aspecific image representing the specific application is contained in theapplication-containing image. The controller 110 operatively displaysthe effect that a specific image representing the specific applicationis contained in the application-containing image, when the drag-downcrosses a reference line preset on the screen of the display 160, andreturns to its original state when the drag-down does not cross thereference line preset on the screen of the display 160.

If a drag-left/right occurs after a touch-and-drag-down in the downdirection where the application-containing image is displayed occurs onthe screen of the display 160 on which a specific application is runningpresently, the controller 110 quits the specific application whileoperatively displaying an effect that a specific image representing thespecific application disappears out of the screen or is wrinkled. Thecontroller 110 operatively displays the effect that a specific imagerepresenting the specific application disappears out of the screen or iswrinkled, when a drag-left/right occurs after the drag-down crosses areference line preset on the screen of the display 160, and returns toits original state when a drag-left/right occurs without the drag-downcrossing the reference line.

When a touch-and-drag-left/right occurs on the application-containingimage or at least one specific image contained in theapplication-containing image, the controller 110 operatively displaysinformation provided by the application while sequentially expanding (orup-scaling) in the drag direction the at least one specific imagerepresenting at least one application running in the background duringthe occurrence of the drag. As an example, the information provided bythe application may include the last screen before the pause of theapplication, or a name of the application, based on which the user maydetermine the type of the application.

If a drag in a direction opposite to the direction where theapplication-containing image is displayed occurs on a specific imagerepresenting an application while a touch-and-drag-left/right occurs onthe application-containing image, the controller 110 resumes theapplication corresponding to the specific image while displaying aneffect that the specific image is taken out of theapplication-containing image. The controller 110 operatively displaysthe effect that the specific image is taken out of theapplication-containing image, when the drag in a direction opposite tothe direction where the application-containing image is displayedcrosses a reference line preset on the screen of the display 160, andreturns to its original state when the drag in a direction opposite tothe direction where the application-containing image is displayed doesnot cross the reference line preset on the screen of the display 160.

If a drag-left/right occurs on a specific image while atouch-and-drag-left/right occurs on the application-containing image,the controller 110 quits an application corresponding to the specificimage while operatively displaying an effect that the specific imagedisappears out of the screen or is wrinkled.

A camera module 140 has a camera sensor for capturing image data andconverting a captured optical image signal into an electrical imagesignal, and a signal processor for converting an analog image signalcaptured by the camera sensor into digital image data. As an example,the camera sensor may be assumed to be a Charge-Coupled Device (CCD) orComplementary Metal-Oxide Semiconductor (CMOS) sensor, and the signalprocessor may be realized with a Digital Signal Processor (DSP).According to exemplary embodiments of the present invention, the camerasensor and the signal processor can be realized integrally orseparately.

An image processor 150 performs Image Signal Processing (ISP) to displayimage signals output from the camera module 140 on the display 160. TheISP includes gamma correction, interpolation, spatial variation, imageeffecting, image scaling, Auto White Balance (AWB), Auto Exposure (AE),Auto Focus (AF), and the like. The image processor 150 processes imagesignals output from the camera module 140 on a frame-by-frame basis, andoutputs frame image data according to the characteristics and size ofthe display 160. The image processor 150 having a video CODEC compressesframe image data displayed on the display 160 using a set coding schemeand decompresses the compressed frame image data into its original frameimage data. The video CODEC may be at least one of a Joint PhotographicExperts Group (JPEG) CODEC, a Moving Picture Experts Group-4 (MPEG4)CODEC, a Wavelet CODEC, and the like. As an example, the image processor150 may be assumed to have an On Screen Display (OSD) feature, and mayoutput OSD data according to the size of a displayed screen under thecontrol of the controller 110.

The display 160 displays image signals output from the image processor150 and user data output from the controller 110, on a screen thereof Asan example, the display 160 may include a Liquid Crystal Display (LCD).In this case, the display 160 may have an LCD controller, a memorycapable of storing image data, an LCD panel, and the like. When the LCDis configured to include a touch screen feature, the LCD may serve as aninput unit. As an example, the same keys as those on the key input unit127 may be displayed on the display 160. As another example, if the LCDis configured to include a touch screen, then the key input unit 127 maybe incorporated into the display 160.

In accordance with an exemplary embodiment of the present invention, thedisplay 160 displays an application-containing image in which at leastone specific image representing at least one application running in thebackground is contained and arranged.

An operation of controlling applications running in this portableterminal will be described in detail with reference to FIGS. 2A to 3F.

FIGS. 2A and 2B show a process of controlling applications that arerunning in a portable terminal according to an exemplary embodiment ofthe present invention, and FIGS. 3A to 3F show operations in the processof FIG. 2. According to an exemplary embodiment of the presentinvention, it is assumed that at least one specific image representingat least one application running in the background is a file image, andan application-containing image containing the file image is a filefolder image. According to an exemplary embodiment of the presentinvention, it is assumed that the file folder image representing theapplication-containing image is displayed at the bottom of a screen ofthe display 160.

An exemplary embodiment of the present invention will be described indetail below with reference to FIGS. 1, 2A, 2B and 3A to 3F together.

Referring to FIGS. 2A and 2B, in step 201, the controller 110 of theportable terminal determines whether there is at least one applicationrunning in the background. If there is at least one application runningin the background, then in step 202, the controller 110 displays a filefolder image in which at least one file image representing at least oneapplication running in the background is contained and arranged, at thebottom of a screen of the display 160 as shown in FIG. 3A.

Referring to FIG. 3A, a file folder image 300, in which at least onefile image 301 representing at least one application running in thebackground is contained and arranged, is displayed at the bottom of thescreen of the display 160.

When a specific gesture occurs or a specific key is input by a user, thecontroller 110 may operatively display a file folder image containing atleast one file image at the bottom of the screen of the display 160 instep 202.

If there is no application running in the background, or if a specificgesture occurs or a specific key is input while the file folder image isdisplayed at the bottom of the screen of the display 160, the controller110 may remove the displayed file folder image.

In step 202, a specific application may be running presently on thescreen of the display 160, or may be in a standby mode.

In step 203, the controller 110 determines whether a touch-and-drag-downin the bottom direction of the screen where the file folder image isdisplayed occurs on the screen while a specific application is runningon the screen of the display 160 in step 202, the controller 110 waitsfor the touch to be released. If a touch-and-drag down in the bottomdirection of the screen where the file folder image is displayed, thenthe process of controlling the applications proceeds to step 204. Instep 204, the controller determines whether the drag occurring in thebottom direction of the screen is released. If the drag occurring in thebottom direction of the screen is released in step 204, then the processof controlling the applications proceeds to step 205 in which thecontroller 110 determines whether the drag crosses a reference linepreset on the screen of the display 160.

If the drag occurring in the bottom direction of the screen is releasedafter it crosses the reference line in step 205, then the process ofcontrolling the applications proceeds to step 206 at which thecontroller 110 pauses a specific application and makes it keep runningin the background while displaying an effect that a file imagerepresenting the specific application running on the screen of thedisplay 160 is contained in the file folder image as shown in FIG. 3B.

Referring to FIG. 3B, if a drag occurring in the bottom direction of thescreen is released after it crosses a reference line A after a touch ona specific part of the screen, then the controller 110 pauses a specificapplication while displaying an effect that a file image 302representing the specific application running on the screen of thedisplay 160 is contained in the file folder image 300.

However, if the drag occurring in the bottom direction of the screen isreleased without crossing the reference line in step 205, then thecontroller 110 returns to step 202 at which the controller operativelydisplays the specific application on the screen of the display 160,returning to its original state.

If a touch-and-drag-down in the bottom direction of the screen where thefile folder image is displayed occurs in step 207 on the screen of thedisplay 160 on which the specific application is running in step 202,then in step 208 the controller 110 determines whether the drag in thebottom direction crosses the reference line preset on the screen of thedisplay 160.

If the drag crosses the reference line in step 208, then the controller110 waits for the next gesture. If the touch is released in step 210after a drag-left/right occurs in step 209 after a drag-down crossingthe reference line, then in step 211, the controller 110 quits thespecific application while displaying an effect that a file imagerepresenting a specific application running on the screen of the display160 disappears out of the screen or is wrinkled, as shown in FIG. 3C.

Referring to FIG. 3C, if a specific part of the screen on which aspecific application is running presently is touched, and the touch isreleased after a drag-left/right occurs after a drag-down crossing thereference line A, then the controller 110 quits the specific applicationwhile displaying an effect that a file image 302 representing thespecific application disappears out of the screen.

If a touch-and-drag-left/right occurs on a file folder image or a fileimage displayed at the bottom of the screen in step 212 while a specificapplication is running on the screen of the display 160 in step 202 orthe screen of the display 160 is in a standby mode, then the process ofcontrolling the applications proceeds to step 231 at which thecontroller 110 operatively displays information provided by theapplication while sequentially expanding at least one file imagerepresenting at least one application contained in the file folder imageand running in the background, during the occurrence of the drag in apredetermined direction as shown in FIG. 3D.

Referring to FIG. 3D, if a drag-right occurs on the file folder image300 or at least one file image 301 displayed at the bottom of thescreen, then the controller 110 may operatively display informationprovided by the application (e.g., the last screen before the pause ofthe application and/or a name of the application), while at least onefile image contained in the file folder image is taken out and expandedone by one, making it possible for the user to recognize at least oneapplication running in the background by taking advantage of the previewfeature.

The at least one file image contained in the file folder image isdisplayed to be contained in the order in which its associatedapplication is paused. For example, if a drag-right occurs on the filefolder image or at least one file image, file images representing pausedand contained applications may be expanded and displayed in the oldorder, and if a drag-left occurs on the file folder image or at leastone file image, file images representing paused and containedapplications may be expanded and displayed in the recent order.

In step 214, it is determined whether a drag-up occurs on a file imageduring display of information provided by the application whilesequentially expanding at least one file image contained in the filefolder image during the occurrence of the drag in a predetermineddirection in step 213. If it is determined, in step 214, that a drag-upoccurs, the process proceeds to step 215, and then the controller 110waits for the touch to be released.

In step 215, it is determined whether the touch is released due to therelease of the drag in step 214. If it is determined, in step 215, thatthe touch is released, then the process of controlling the applicationsproceeds to step 216 at which the controller 110 determines whether thedrag-up crosses a reference line preset on the screen of the display160. If it is determined that the drag-up crosses the reference line,then the process of controlling the applications proceeds to step 217 atwhich the controller 110 operatively displays an applicationcorresponding to a selected file image on the screen of the display 160and resumes the application while displaying an effect that the fileimage selected by the drag-up is taken out of the file folder image, asshown in FIG. 3E.

Referring to FIG. 3E, if a drag-up occurs on a file image 301Brepresenting an application and crosses the reference line A duringdisplay of information provided by the application while sequentiallyexpanding at least one file image contained in the file folder image 300during the occurrence of the drag-left/right, then the controller 110operatively displays the application corresponding to the file image301B on the screen of the display 160 and resumes the application whiledisplaying an effect that the file image 301B is taken out of the filefolder image.

If the touch is released without the drag-up crossing the reference linein step 216, then the controller 110 returns to step 213 at which thecontroller 110 operatively displays information provided by theapplication while sequentially expanding at least one file imagecontained in the file folder image during the occurrence of the drag ina predetermined direction, thereby retuning to its original state.

In contrast, if it is determined that a drag-up does not occur on a fileimage in step 214, then the process proceeds to step 218. In step 218,it is determined whether a drag-left or a drag-right occurs. If it isdetermined that a drag-left or a drag-right does not occur, the processreturns to step 214. If it is determined that a drag-left or adrag-right occurs, the process proceeds to step 219.

In step 219, it is determined whether a touch is released. If it isdetermined that the touch is released in step 219 after adrag-left/right occurs on a file image during display of informationprovided by an application in step 218 while sequentially expanding atleast one file image contained in the file folder image duringoccurrence of a drag in the predetermined direction in step 213, thenthe process of controlling the applications proceeds to step 220 atwhich the controller 110 quits the application corresponding to aselected file image while displaying an effect that the file imageselected by the drag-left/right disappears out of the screen or iswrinkled, as shown in FIG. 3F.

Referring to FIG. 3F, if a drag-right occurs on a file image 301Brepresenting an application during display of information provided bythe application while sequentially expanding at least one file imagecontained in the file folder image 300 during the occurrence of thedrag-left, then the controller 110 quits the application correspondingto the file image 301B while displaying an effect that the file image301B disappears out of the screen or is wrinkled.

As is apparent from the foregoing description, the multi-taskingexecution apparatus and method provided by the present invention mayeasily and intuitively control applications running in the portableterminal.

While the invention has been shown and described with reference tocertain exemplary embodiments thereof, it will be understood by thoseskilled in the art that various changes in form and details may be madetherein without departing from the spirit and scope of the invention asdefined by the appended claims and their equivalents.

1. An apparatus comprising: a display; and a processor configured to:identify a first application and a second application executed in abackground of the apparatus; and concurrently present, via the display,a first image representing the first application executed in thebackground, and a second image representing the second applicationexecuted in the background, the concurrently presenting includingdisplaying at least one portion of the first image as overlapped with atleast one portion of the second image.
 2. The apparatus of claim 1,wherein the processor is further configured to: concurrently present thefirst image and the second image in response to a user input to requesta state corresponding to a multi-tasking associated with the firstapplication and the second application.
 3. The apparatus of claim 1,wherein the processor is further configured to: move the first image orthe second image along with a user input received in relation with acorresponding image of the first image and the second image.
 4. Theapparatus of claim 3, wherein the processor is further configured to:transition an execution of a corresponding application of the firstapplication and the second application from the background to aforeground of the apparatus based at least in part on a determinationthat the moving of the corresponding image satisfies a specifiedcondition.
 5. The apparatus of claim 3, wherein the processor is furtherconfigured to: terminate an execution of a corresponding application ofthe first application and the second application in the background basedat least in part on a determination that the moving of the correspondingimage satisfies a specified condition.
 6. The apparatus of claim 5,wherein the processor is further configured to: modify or hide thecorresponding image as part of the terminating of the execution of thecorresponding application.
 7. The apparatus of claim 1, wherein theprocessor is further configured to: present, via the display, a thirdapplication executed in a foreground of the apparatus; and transition anexecution of the third application from the foreground to the backgroundin response to a user input, the transitioning including presenting, viathe display, a third image representing the third applicationtransitioned to the background in relation with the first and the secondimages.
 8. The apparatus of claim 7, wherein the processor is furtherconfigured to: present an effect associated with the third image, aspart of the transitioning of the execution of the third application fromthe foreground to the background.
 9. The apparatus of claim 7, whereinthe processor is further configured to: present the third image at leastpartially overlapping with the first image or the second image.
 10. Amethod comprising: identifying, at an electronic device, a firstapplication and a second application executed in a background of theelectronic device; concurrently presenting, via a display operativelycoupled with the electronic device, a first image representing the firstapplication executed in the background, and a second image representingthe second application executed in the background, the concurrentlypresenting including displaying at least one portion of the first imageas overlapped with at least one portion of the second image.
 11. Themethod of claim 10, wherein the concurrently presenting of the firstimage and the second image comprises: concurrently presenting the firstimage and the second image in response to a user input to request astate corresponding to a multi-tasking associated with the firstapplication and the second application.
 12. The method of claim 10,further comprising: moving the first image or the second image alongwith a user input received in relation with a corresponding image of thefirst image and the second image.
 13. The method of claim 12, whereinthe concurrently presenting of the first image and the second imagecomprises: transitioning an execution of the corresponding applicationof the first application and the second application from the backgroundto a foreground of the apparatus based at least in part on adetermination that the moving of the corresponding image satisfies aspecified condition.
 14. The method of claim 13, wherein thetransitioning of the execution of the corresponding applicationcomprises: presenting an effect associated with the corresponding image,as part of the transitioning.
 15. The method of claim 12, wherein theconcurrently presenting of the first image and the second imagecomprises: terminating an execution of a corresponding application ofthe first application and the second application in the background,based at least in part on a determination that the moving of thecorresponding image satisfies a specified condition.
 16. The method ofclaim 15, wherein the terminating of the execution of the correspondingapplication comprises: modifying or hiding the corresponding image aspart of the terminating.
 17. The method of claim 10, wherein theconcurrently presenting of the first image and the second image of thethird image comprises: presenting, via the display, a third applicationexecuted in a foreground of the apparatus; and transitioning anexecution of the third application from the foreground to the backgroundin response to a user input, the transitioning including presenting, viathe display, a third image representing the third applicationtransitioned to the background in relation with the first and the secondimages.
 18. The method of claim 17, wherein the presenting of the thirdapplication comprises: presenting the third image at least partiallyoverlapping with the first image or the second image.
 19. The method ofclaim 10, wherein the concurrently presenting of the first image and thesecond image comprises: acquiring a user input in relation with thefirst image or the second image; and presenting an extended image of thefirst image or the second image in response to the user input.
 20. Anon-transitory machine-readable storage device storing instructionsthat, when executed by one or more processors, cause the one or moreprocessors to perform operations comprising: identifying, at anelectronic device, a first application and a second application executedin a background of the electronic device; and concurrently presenting,via a display operatively coupled with the electronic device, a firstimage representing the first application executed in the background, anda second image representing the second application executed in thebackground, the concurrently presenting including displaying at leastone portion of the first image as overlapped with at least one portionof the second image.